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Bio Midterm
Studying Duh
74
Biology
Undergraduate 2
04/23/2011

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Term
Homeostasis
Definition
Maintenance of normal internal conditions
Term
Order of organism classifications
Definition
Smallest to Largest: Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain
Term
Domain
Definition
Three Domains: Archaea, Bacteria, Eukarya
Term
Archaea
Definition
A group of single celled microorganisms, no nucleus, no membrane-bound organelles
Term
Bacteria
Definition
a large domain of single celled prokaryote microorganisms
Term
Eukarya
Definition
is an organism whose cells contain complex structures enclosed within membranes
Term
Kingdoms
Definition
Can be divided up into Phyla, this class is below Domain
Term
Scientific Process
Definition
Hypothesis, Experiment, Theory
Term
Organic Molecule
Definition
Chemical Compound contains CARBON
Term
Polymer
Definition
Macromolecule of repeating structures held together by Covalent Bonds
Term
Monomer
Definition
Atom or small molecule that combines to form a polymer
Term
Dehydration Reaction
Definition
Reaction that has a loss of water during it
Term
Hydrolysis
Definition
H2O --> H+ & (OH)- ; Also breaks down polymers
Term
Carbs
Definition
Ready Energy, it is a saccharide
Term
Monosaccharide
Definition
simplest form of sugar; Ex: Glucose, Fructose
Term
Polysaccharide
Definition
Glycogen, Cellulose, Starch
Term
Starch
Definition
polysaccharide, a large number of glucose
Term
Lipids
Definition
Fats (Solids) & Oils (Liquids)
Term
Trans Fats
Definition
Hydrogenate to unsaturated Fat
Term
Unsaturated
Definition
Margarine, liquid at room temperature, double bonds present
Term
Saturated
Definition
Solid at room temperature, contains only single bonds, stick butter
Term
triglyceride
Definition
combine glycerol with three molecules of fatty acid
Term
phospholipid
Definition
major component of cell membrane and can form lipid bilayers
Term
Steroid
Definition
Contains cholesterol and the hormones: testosterone and estradiol
Term
Protein
Definition
most enzymes are proteins, Amino Acids
Term
Peptide Bond
Definition
Bond between amino acids
Term
Polypeptide
Definition
Short polymers of Amino Acids, shorter peptide bond lengths than in proteins
Term
Cell Theory
Definition
Basic Unit of structure in all living things, smallest living thing
Term
Surface-Area-To-Volume ratio
Definition
The Bigger the cell is, the less surface area there is per unit volume
Term
Prokaryote
Definition
smallest known cells, no nucleus, no membrane bound organelles
Term
Eukaryote
Definition
Plasma (cell) membrane, Nucleus, Cytoplasmic Organelles
Term
Nucleus
Definition
Contains DNA, unless it's a prokaryote
Term
Ribosomes
Definition
Makes Protein from amino acids and RNA representing the protein
Term
Endomembrane System
Definition
Helps transportation in and out of the cell through Diffusion
Term
Chloroplast
Definition
In Plant cells and conducts photosynthesis, captures incoming light
Term
Mitochondria
Definition
Creates ATP, site of cellular respiration
Term
Enzyme
Definition
Catalyst for chemical reactions, usually end in -ase, is a protein
Term
Active Site
Definition
part of an enzyme where substrates bind and undergo a chemical reaction
Term
First law of thermodynamics
Second law of thermodynamics
Definition
Conservation of Energy
Things will move towards equillibrium
Term
Enzyme Reaction
Definition
Increases with substrate concentration.
Term
Diffusion
Definition
Moves particles from higher concentration to lower concentration
Term
Osmosis
Definition
movement of solvent molecules across a SEMI-PERMEABLE membrane
Term
facilitated diffusion
Definition
Is part of passive transport, moves material through a membrane.
Term
Active Transport
Definition
Opposite of diffusion. Moves particles from low to high concentration. Uses ATP.
Term
endocytosis
Definition
Cells engulf molecules
Term
exocytosis
Definition
Cells spit out molecules
Term
Autotroph
Definition
Makes own food (Plant)
Term
chlorophyll
Definition
Pigment, absorbs the light. Exists in plants.
Term
thylakoid
Definition
flattened sac, contains chlorophyll and it is where photosynthesis occurs
Term
stroma
Definition
fluids within chloroplast that contain enzymes which synthesize carbs
Term
stomata
Definition
outside of cell that is a small opening letting gas in
Term
redox reactions
Definition
one molecule gains electron(s), one molecule loses 'em
Term
redox reactions
Definition
one molecule gains electron(s), one molecule loses 'em
Term
light dependent reaction/ light independent reaction
Definition
light dependent reactions generate ATP, while light independent reactions use the ATP
Term
calvin cycle
Definition
series of redox reactions taking place in chloroplasts, occurs in light independent reaction
Term
NADP
Definition
Reducing agent in NADP
Term
NADPH
Definition
reduced form of NADP
Term
Photosystem I / Photosystem II
Definition
The SECOND stage of photosynthesis is photosystem I
The FIRST stage of photosynthesis is photosystem II.
Term
electron transport chain
Definition
Takes electron from donor, gives to receiver
Term
proton gradient
Definition
A higher concentration of protons in one area vs another.
Term
NAD
Definition
Accepts electrons and hydrogen to become NADH
Term
FAD
Definition
Accepts electrons and becomes FADH2
Term
Glycolosis
Definition
converts glucose to pyruvate. Used to form ATP.
Term
Krebs Cycle
Definition
Carbons oxidized to CO2.
Term
mitochondria
Definition
Cellular respiration occurs HERE
Term
Brophy's Penis
Definition
Flaccid
Term
Somatic Cell
Definition
Diploid, A cell that forms the body of an organism BUT NOT GAMETES
Term
Haploid
Definition
Gametes, Half as many chromosomes
Term
binary fission
Definition
form of asexual reproduction
Term
homologous chromosomes
Definition
Pair of chromosomes that are alike and come together during cell division.
Term
homologous chromosomes
Definition
Pair of chromosomes that are alike and come together during cell division.
Term
autosome
Definition
any chromosome other than the sex chromosomes.
Term
synapsis
Definition
Pairing of homologous chromosomes during prophase I.
Term
cross over
Definition
exchange of genetic material between homologous chromosomes.
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